Punculis, P., and I. Zakis. “Evaluation Aspects for Ecological Risk in Operation of Field Sprayers”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (June 26, 2006): 225–231. Accessed May 13, 2024. https://journals.ru.lv/index.php/ETR/article/view/2029.